Organic light emitting diode display device and method for manufacturing the same

ABSTRACT

An OLED display device includes a display area of a substrate to display images; a non-display area surrounding the display area and applying signals to pixels within the display area; a first thin film transistor formed in the non-display area of the substrate; a second thin film transistor formed in the display area of the substrate; a planarization film formed over the first and second thin film transistors; a first electrode formed on the planarization film in the non-display area and formed with at least one first opening; a second electrode formed on the planarization film and connected to a electrode of the second thin film transistor; a bank pattern formed on the second electrode and the first electrode and exposing a part of the second electrode. The bank pattern is adjacent to the first electrode.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.13/622,799 filed on Sep. 19, 2012, which claims priority under 35 U.S.C.119(a) to Korean Patent Application No. 10-2011-0094832 filed on Sep.20, 2011, which are hereby incorporated by reference in their entirety.

BACKGROUND

1. Field of the Disclosure

This disclosure relates an organic light emitting diode display device,and more particularly to an organic light emitting diode display deviceand a manufacturing method thereof which are adapted to enhancereliability.

2. Description of the Related Art

Various kinds of flat panel display devices that can replace heavy andbulky cathode ray tubes (CRTs) have been recently developed. Examples ofthe flat panel display devices include a liquid crystal display (LCD)device, a field emission display (FED) device, a plasma display panel(PDP), and a light-emitting diode display device.

The light-emitting diode display device is classified into an inorganiclight-emitting diode display device and an organic light-emitting diode(OLED) display device according to the material of a light emissionlayer. Such a light-emitting diode display device has goodcharacteristics, including a rapid response time, a high light-emittingefficiency, a high brightness, and a wide viewing angle because of beingself-luminous.

The OLED includes an organic light-emitting compound layer configured toemit light, and an anode electrode and a cathode electrode facing eachother with the organic light-emitting compound layer therebetween. Theorganic light-emitting compound layer includes a hole injection layerHIL, a hole transport layer HTL, an emission layer EML, an electrontransport layer ETL and an electron injection layer EIL.

Such an OLED injects holes and electrons to the emission layer EML eachthrough the cathode and anode electrodes and enables the emission layerto emit light by energy from excitons which are generated in anexcitation process that the holes and the electrons are recombined witheach other in the emission layer EML. In accordance therewith, the OLEDdisplay device electrically controls the quantity of light generated inthe emission layer EML of the OLED and displays an image.

The OLED display device includes a thin film transistor (TFT), aplanarization film formed in such a manner as to cover the TFT, an anodeelectrode connected to the TFT, a bank pattern formed on the TFT and theanode electrode, an organic light-emitting compound layer formed on thebank pattern and the anode electrode, and a cathode electrode formed onthe organic light-emitting compound layer.

The OLED display device includes a buffer layer, a semiconductor activepattern, a gate insulation film, a gate metal pattern, an interlayerinsulation film, a source/drain metal pattern and a passivation filmwhich are sequentially formed on a substrate. The gate metal patternincludes a gate electrode of the TFT. The source/drain metal patternincludes source and drain electrodes of the TFT. The anode electrode isconnected to the drain electrode of the TFT through a contact hole whichpenetrates through the passivation film.

Such an OLED display device can be defined into a display area used todisplay images and a non-display area surrounding edges of the displayarea. In the non-display area, a circuit portion and a ground connectionportion can be formed. The circuit portion is used to apply drivevoltages to a plurality of drive lines formed in the display area.

Similarly to the display area, another TFT, the planarization film, theanode electrode and so on are formed in the circuit portion of thenon-display area.

However, residual materials within the planarization film formed in thecircuit portion of the non-display area can be out-gassed with the lapseof time. The out-gassed residual materials affect the organiclight-emitting compound layer formed in the display area. Due to this,the organic light-emitting compound layer can deteriorate.

The deterioration of the organic light-emitting compound layer causesfaults and forces the reliability of the OLED display device todeteriorate.

BRIEF SUMMARY

Accordingly, the present embodiments are directed to an OLED displaydevice that substantially obviates one or more of problems due to thelimitations and disadvantages of the related art, and a method ofmanufacturing the same.

An object of the present embodiments is to provide an OLED displaydevice and a manufacturing method of thereof that are adapted tominimize the movement of out-gassed materials from a circuit portion ofa non-display area toward a display area and prevents the deteriorationof an OLED within the display area, by forming holes in an anodeelectrode within the circuit portion.

Another object of the present embodiments is to provide an OLED displaydevice and a manufacturing method thereof that are adapted to enhancethe reliability.

Additional features and advantages of the embodiments will be set forthin the description which follows, and in part will be apparent from thedescription, or may be learned by practice of the embodiments. Theadvantages of the embodiments will be realized and attained by thestructure particularly pointed out in the written description and claimshereof as well as the appended drawings.

According to one general aspect of the present embodiment, an OLEDdisplay device includes: a display area defined in a substrate andconfigured to display images; a non-display area defined to include thecircumference of the display area and configured to apply signals topixels within the display area; a first thin film transistor formed inthe non-display area of the substrate; a second thin film transistorformed in the display area of the substrate; a planarization film formedover the first and second thin film transistors; a first electrodeformed on the planarization film in the non-display area and configuredto include at least one first opening; a second electrode formed on theplanarization film and connected to a electrode of the second thin filmtransistor; a bank pattern formed on the second electrode and the firstelectrode and configured to expose a part of the second electrode,wherein the bank pattern is arranged to be adjacent to the firstelectrode; an organic light-emitting layer formed on the secondelectrode; and a third electrode formed on the organic light-emittinglayer.

A method for manufacturing an OLED display device according to anothergeneral aspect of the present embodiment includes: preparing a substratedefined into a display area configured to display images, and anon-display area positioned at outer sides of the display area; formingfirst and second thin film transistors in the non-display area and thedisplay area of the substrate, respectively; forming a planarizationfilm having a first contact hole exposing a part of an electrode of thesecond thin film transistor, on the substrate provided with the firstand second thin film transistors; forming a first electrode including atleast one first opening and facing the first thin film transistor, onthe planarization film provided with the first contact hole, and asecond electrode, which is connected to the electrode of the second thinfilm transistor; forming a bank pattern, in which an opening exposing apart of the second electrode is formed, on the first electrode and thesecond electrode; forming an organic light-emitting layer on the anodeelectrode; and forming a third electrode on the organic light-emittinglayer.

According to another general aspect of the present embodiment, an OLEDdisplay device includes: a display area defined in a substrate andconfigured to display images; a non-display area defined to include thecircumference of the display area and configured to apply signals topixels within the display area; a first thin film transistor formed inthe non-display area of the substrate; a second thin film transistorformed in the display area of the substrate; a planarization film formedover the first and second thin film transistors; a first thin filmtransistor formed in the non-display area of the substrate andconfigured to guide materials out-gassed from the planarization film tobe exhausted to the bank pattern; a second electrode formed on theplanarization film and connected to a electrode of the second thin filmtransistor; a bank pattern formed on the second electrode and the firstelectrode and configured to expose a part of the second electrode,wherein the bank pattern is arranged to be adjacent to the firstelectrode; an organic light-emitting layer formed on the secondelectrode; and a third electrode formed on the organic light-emittinglayer.

Other systems, methods, features and advantages will be, or will become,apparent to one with skill in the art upon examination of the followingfigures and detailed description. It is intended that all suchadditional systems, methods, features and advantages be included withinthis description, be within the scope of the present disclosure, and beprotected by the following claims. Nothing in this section should betaken as a limitation on those claims. Further aspects and advantagesare discussed below in conjunction with the embodiments. It is to beunderstood that both the foregoing general description and the followingdetailed description of the present disclosure are exemplary andexplanatory and are intended to provide further explanation of thedisclosure as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the embodiments and are incorporated herein andconstitute a part of this application, illustrate embodiment(s) of thepresent disclosure and together with the description serve to explainthe disclosure. In the drawings:

FIG. 1 is a plan view schematically showing an OLED display deviceaccording to an embodiment of the present disclosure;

FIG. 2 is a circuitry diagram showing the circuit configuration of apixel in FIG. 1;

FIG. 3 is a cross-sectional diagram of the OLED display device takenalong the line I-I′ in FIG. 1;

FIGS. 4 through 10 are cross-sectional diagrams illustrating processesof manufacturing the OLED display device of FIG. 1; and

FIG. 11 is a cross-sectional diagram of an OLED display device takenalong the line I-I′ in FIG. 1, according to another embodiment of thepresent disclosure.

DETAILED DESCRIPTION

Reference will now be made in detail to the embodiments of the presentdisclosure, examples of which are illustrated in the accompanyingdrawings.

FIG. 1 is a plan view schematically showing an OLED display deviceaccording to an embodiment of the present disclosure, and FIG. 2 is acircuitry diagram showing the circuit configuration of a pixel inFIG. 1. As shown in FIGS. 1 and 2, the OLED display device 1000according to an embodiment of the present disclosure includes asubstrate 190. The substrate 190 is defined into a display area AA usedto display images and a non-display area NDA which surrounds edges ofthe display area AA and is loaded with circuit portions. The circuitportions are used to apply drive voltages to the display area AA.

The OLED display device can include a pad portion PA, a wiring portionWA and an integrated circuit (IC) chip which are disposed in thenon-display area NDA. The wiring portion WA can include a plurality ofwires used to guide a plurality of signals and a plurality of voltages,which are applied from the exterior through the pad portion PA, to thedisplay area AA. The IC chip is electrically connected to pixels formedin the display area AA, through data lines formed in the display areaAA.

The OLED display device can further include another circuit portionwhich is formed on the non-display area NDA of the substrate in agate-in-panel (GIP) shape. Another circuit portion applies scan signalsto the pixels SP through scan lines.

The pixels are arranged on the display area AA of the substrate 190 in amatrix shape. The pixels are connected to the IC chip through the datalines extending to the wiring portion WA. Also, the pixels are connectedto another circuit portion through the scan lines extending to thewiring portion WA. Furthermore, the pixels are connected to a powersource by power lines which pass through the wiring portion WA.

Each of the pixels can have a 2T1C (two transistors and one capacitor)configuration. In other words, the pixel can include a switchingtransistor, a drive transistor, a capacitor and an OLED. Alternatively,the pixel can be configured to further include still another transistorand another capacitor. The elements included in the pixel of the 2T1Cconfiguration can be connected to one another as shown in FIG. 2.

The switching transistor S1 includes a gate electrode connected to thescan line SL to receive the scan signal. The switch transistor S1further includes a source electrode connected to the data line DL toreceive the data signal, and a drain electrode connected to a first nodeN1.

The drive transistor T1 includes a gate electrode connected to the firstnode N1. The drive transistor T1 further includes a source electrodeconnected to a first power line VDD to which a high voltage is applied,and a drain electrode connected to an anode electrode of the OLED D.

The capacitor Cst includes one end connected to the first node N1 andthe other end connected to the first power line VDD. The OLED D includesthe anode electrode connected to the drain electrode of the drivetransistor T1, and a cathode electrode connected to a second power lineGND to which a low voltage is applied.

FIG. 2 is described above with reference to using transistors S1 and T1that are P-type transistors, as an example. However, the presentembodiment is not limited to this.

The high voltage applied through the first power line VDD can be higherthan the low voltage applied through the second power line GND. The highand low voltages applied through the first and second power lines VDDand GND can be exchanged for each other according to the drive mode ofthe pixel.

The above-mentioned pixel can be driven as follows. When the scan signalis applied through the scan line SL, the switching transistor S1 isturned on. As such, the data signal on the data line DL is applied tothe first node N1 through the turned-on switching transistor S1 andstored in the capacitor Cst as a data voltage. The switching transistorS1 is turned-off when the scan signal is not applied to the scan lineSL. Meanwhile, the drive transistor T1 is driven by the data voltagestored in the capacitor Cst. Then, the high voltage on the first powerline VDD enables a current to flow towards the second power line GND,which causes the OLED to emit light. This drive method is provided as anexample. As such, the present embodiment is not limited to this drivemethod.

The pad portion PA is disposed in an edge of the substrate 190. The padportion PA is connected to an external substrate by an anisotropicconductive film or others. Also, the pad portion PA is connected to thewiring portion WA. Such a pad portion PA can transfer various drivesignals, voltages and so on, which are applied from the externalsubstrate, to the display area AA, the integrated circuit chip, thecircuit portions and so on.

The wiring portion WA is used to transfer the transfer the various drivesignals, the voltages and so on, which are applied from the pad portionPA, to the display area AA, the integrated circuit chip, the circuitportions and so on. To this end, the wiring portion WA can include datalink lines used to transfer data signals to the integrated circuit chipIC, clock lines used to transfer clock signals and so on to the circuitportions, and power lines VDD and GND used to transfer the high and lowvoltages. Hereinafter, the power line used to transfer the low voltagewill be referred to as a ground line.

FIG. 3 is a cross-sectional diagram of the OLED display device 1000taken along the line I-I′ in FIG. 1. As shown in FIGS. 1 and 3, the OLEDdisplay device 1000 can be defined into a display area AA and anon-display area NDA. The non-display area NDA can include a GIP areaand a GND contact area.

The OLED display device 1000 can include first and second thin filmtransistors TFT-1 and TFT-2, a passivation film 135, a planarizationfilm 140, a first electrode 175 and a second electrode 145, a bankpattern 150, an organic light-emitting compound layer 155, and a thirdelectrode 160, which are sequentially formed on a substrate 100. Thepassivation film 135 is formed in such a manner to cover the first andsecond thin film transistors TFT-1 and TFT-2. The second and thirdelectrodes 145 and 160 are either an anode electrode or a cathodeelectrode. If the second electrode 145 is an anode electrode, the thirdelectrode 160 is a cathode electrode, and if the second electrode 145 isa cathode electrode, the third electrode is an anode electrode 160.

The first thin film transistor TFT-1 is formed in the GIP area of thenon-display area NDA. The second thin film transistor TFT-2 is formed inthe display area AA.

Also, the OLED display device 1000 can include a buffer layer 105,semiconductor active patterns 110 a and 110 b, a gate insulation film127, a gate metal pattern, an interlayer insulation film 130, asource/drain metal pattern, and the passivation film 135, which areformed on the substrate 100.

The gate metal pattern can include gate electrodes 115 a and 115 b ofthe first and second thin film transistors TFT-1 and TFT-2. Thesource/drain metal pattern can include fourth and fifth electrodes 120 aand 120 b and sixth and seventh electrodes 125 a and 125 b of the thinfilm transistors TFT-1 and TFT-2 and a conductive pattern 170. Thefourth, fifth, sixth and seventh electrodes 120 a, 120 b, 125 a and 125b are either a drain electrode or a source electrode. If the fourthelectrode 120 a is a source electrode, the sixth electrode 125 a is adrain electrode, and if the fourth electrode 120 a is a drain electrode,the sixth electrode 125 a is a source electrode. If the fifth electrode120 b is a source electrode, the seventh 125 b electrode is a drainelectrode, and if the fifth 120 b electrode is a drain electrode, theseventh electrode 125 b is a source electrode.

The second electrode 145 is electrically connected to the seventhelectrode 125 b of the second thin film transistor TFT-2 through a firstcontact hole H1. The first contact hole H1 is formed in such a manner asto penetrate through the planarization film 140 and the passivation film135 within the display area AA. If the second electrode 145 is an anodeelectrode, the seventh electrode 125 b is a drain electrode, and if thesecond electrode 145 is a cathode electrode, the seventh electrode 125 bis a source electrode.

The first thin film transistor TFT-1 can include the first semiconductoractive pattern 110 a formed on the buffer layer 105, the first gateelectrode 115 a formed on the first semiconductor active pattern 110 awith the gate insulation film 127 therebetween, and the fourth and sixthelectrodes 120 a and 125 a formed on the first gate electrode 115 a withthe interlayer insulation film 130 therebetween. The fourth and sixthelectrodes 120 a and 125 a are spaced a fixed distance from each other.

The second thin film transistor TFT-2 can include the secondsemiconductor active pattern 110 b formed on the buffer layer 105, thesecond gate electrode 115 b formed on the second semiconductor activepattern 110 b with the gate insulation film 127 therebetween, and thefifth and seventh electrodes 120 b and 125 b formed on the second gateelectrode 115 b with the interlayer insulation film 130 therebetween.The fifth and seventh electrodes 120 b and 125 b are spaced a fixeddistance from each other.

The first electrode 175 is formed on the non-display area NDA. The firstelectrode 175 is electrically connected to the conductive pattern 170within the GND contact area through a second contact hole H2. At leastone first opening H3 is formed in the first electrode 175 within the GIParea of the non-display area NDA. If a plurality of first openings H3 isformed in the first electrode 175 within the GIP area, they are spaced afixed interval from one another.

The second electrode 145 disposed within the display area AA is formedfrom the same material and through the same process as the firstelectrode 175. However, the second electrode 145 is not connectedelectrically to the first electrode 175.

The first opening H3 formed in the first electrode within the GIP areacan guide materials out-gassed from the planarization film 140 withinthe GIP area to be exhausted to the bank pattern 150. As such, theaffection of the materials, which is out-gassed from the planarizationfilm 140 within the GIP area, to be applied to the organiclight-emitting compound layer 150 can be minimized. In accordancetherewith, the deterioration of the organic light-emitting compoundlayer 150 can be prevented. As a result, the OLED display deviceaccording to the present embodiment can enhance the reliability. Theabove-mentioned configuration of the first electrode is one example ofthe first electrode 175 configured to guide materials out-gassed fromthe planarization film 140 within the GIP area to be exhausted to thebank pattern 150.

FIGS. 4 through 10 are cross-sectional views illustrating processes ofmanufacturing the OLED display device of FIG. 1. As shown in FIG. 4,processes of forming first and second thin film transistors TFT-1 andTFT-2 on a substrate 100 are performed. First, a buffer layer 105 isformed on the substrate 100 by depositing silicon oxide SiO₂ or siliconnitride SiNx on the substrate 100 using a chemical vapor deposition(CVD) technique. Then, first and second semiconductor active patterns110 a and 110 b are formed on the buffer layer 105. The first and secondsemiconductor active patterns 110 a and 110 b can be prepared by formingfirst and second polysilicon patterns on the buffer layer 105 and dopingp+ ions into the first and second polysilicon patterns. The first andsecond polysilicon patterns can also be formed by depositing n+-phydrogenated amorphous silicon (a-Si:H) on the buffer layer 105 usingthe CVD technique, crystallizing the deposited n+-p hydrogenatedamorphous silicon (a-Si:H) into a polysilicon layer, and patterning thepolysilicon layer.

A gate insulation film 127 is formed on the buffer layer 105 in such amanner as to cover the first and second semiconductor active patterns110 a and 110 b. The gate insulation film 127 is prepared by depositingsilicon oxide SiO₂ or silicon nitride SiNx on the buffer layer 105provided with the first and second semiconductor active patterns 110 aand 110 b.

Subsequently, first and second gate electrodes 115 a and 115 b areformed on the gate insulation film 127. The first and second gateelectrodes 115 a and 115 b can be prepared by depositing a metal film onthe gate insulation film 127 using a sputtering technique and patterningthe deposited metal film through a first photolithograph process. Themetal film can be formed from either at least one of aluminum Al,aluminum-neodymium AlNd and molybdenum or an alloy thereof.

An interlayer insulation film 130 is formed on the gate insulation film127 in such a manner to cover the first and second gate electrodes 115 aand 115 b. The interlayer insulation film 130 can be prepared bydepositing silicon oxide SiO₂ or silicon nitride SiNx on the gateinsulation film 127 provided with the first and second gate electrodes115 a and 115 b.

In succession, contact holes partially exposing the first and secondsemiconductor active patterns 110 a and 110 b are formed in theinterlayer insulation film and the gate insulation film 127. The contactholes can be formed by continuously etching the interlayer insulationfilm 130 and the gate insulation film 127, which corresponding topositions in which fourth, fifth, sixth and seventh electrodes 120 a,120 b, 125 a and 125 b will be formed, through a second photolithographprocess.

Afterward, the fourth, fifth, sixth and seventh electrodes 120 a, 120 b,125 a and 125 b, which are connected to the first and secondsemiconductor active patterns 110 a and 110 b through the contact holes,are formed on the interlayer insulation film 130. The fourth, fifth,sixth and seventh electrodes 120 a, 120 b, 125 a and 125 b can be formedby depositing a source/drain metal film on the interlayer insulationfilm 130 using the CVD technique and patterning the depositedsource/drain metal film through a third photolithograph process. Thesource/drain metal film can be formed in either a single layer or astacked-layer structure, formed from molybdenum Mo, chromium Cr, copperCu, alloys thereof and so on.

At the same time, a conductive pattern 170 is formed on the interlayerinsulation film 130 within the GND contact area of the non-display areaNDA. The conductive pattern 170 will be electrically connected to anexternal ground source.

Continuously, a passivation film 135 is formed on the interlayerinsulation film 130 in such a manner as to cover the fourth, fifth,sixth and seventh electrodes 120 a, 120 b, 125 a and 125 b. Thepassivation film 135 can be formed by depositing one of silicon oxideSiO₂ and silicon nitride SiNx on the interlayer insulation film 130,which is provided with the fourth, fifth, sixth and seventh electrodes120 a, 120 b, 125 a and 125 b, using the CVD technique. Alternatively,the passivation film 135 can be formed by coating an organic material onthe interlayer insulation film 130 provided with the fourth, fifth,sixth and seventh electrodes 120 a, 120 b, 125 a and 125 b.

Also, first and second contact holes H1 and H2 are formed by patterningthe planarization film 135 through a fourth photolithograph process. Thefirst contact hole H1 exposes the seventh electrode 125 b. The secondcontact hole H2 exposes a part of the conductive pattern 170 formedwithin the GND contact area of the non-display area NDA.

As shown in FIG. 5, a planarization film 140 is formed on thepassivation film 135. The planarization film 140 can be formed by anorganic liquid material, such as polyimide, a benzocyclobutene-basedresin, acrylate or others, on the passivation film 135 and curing thespin-coated organic material. The planarization film 140 is patterned inorder to expose the seventh electrode 125 b corresponding to the firstcontact hole H1.

Subsequently, a transparent conductive film 200 is formed on the entiresurface of the substrate 100 provided with the planarization film 140,as shown in FIG. 6. The transparent conductive film 200 can be preparedby depositing a transparent conductive material on the entire surface ofthe substrate 100, which is provided with the planarization film 140,using a sputtering technique. Also, the transparent conductive film 200can be formed from one selected from a material group which includesindium-tin-oxide ITO, tin-oxide TO, indium-zinc-oxide IZO,indium-tin-zinc-oxide ITZO and so on. Also, a silver layer and asecondary transparent conductive material (not shown in the drawings)are sequentially formed on the substrate 100 covered with thetransparent conductive film 200.

The transparent conductive film 200, the silver layer and the secondarytransparent film are patterned into a second electrode 145 and a firstelectrode 175 through a fifth photolithograph process, as shown in FIG.7. The second electrode 145 is disposed in the display area AA and thefirst electrode 175 is disposed within the non-display area NDA.

The second electrode 145 and the first electrode 175 are formed in atriple layered structure. The second electrode 145 formed in the displayarea AA is electrically connected to the seventh electrode 125 b throughthe first contact hole H1.

The first electrode 175 formed within the non-display area NDA has atleast one first opening H3 which is formed by the fifth photolithographprocess. The at least one first opening H3 can include a plurality offirst openings spaced a fixed interval from one another.

The at least one first opening H3 can be formed in the shape of acircle, a rhombus, or a rectangle, but it is not limited to these. Thesize of the first opening H3 depends the distance between the firstopenings H3.

Such a first electrode 175 disposed within the non-display area NDA iselectrically connected to the conductive pattern 170 within the GNDcontact area of the non-display area NDA through the second contact holeH2. Therefore, the first electrode 175 can be used to transfer a groundvoltage GND.

As shown in FIG. 8, a bank pattern 150 is formed on the substrate 100provided with the second electrode 145 and the first electrode 175. Thebank pattern 150 can be formed by coating an organic photo-resistivematerial, such as polyimide, photoresist or others, on the entiresurface of the substrate 100 provided with the second electrode 145 andthe first electrode 175, and patterning the coated organicphoto-resistive material through a sixth photolithograph process. Such abank pattern 150 is used to define light-emission cells.

Thereafter, a spacer 165 and an organic light-emitting compound layer155 are sequentially formed on the substrate 100 provided with the bankpattern 150, as shown in FIG. 9. The spacer 165 is formed from siliconoxide SiO₂ or silicon nitride SiNx. The organic light-emitting compoundlayer 155 is formed on the substrate 100 provided with the spacer 165.Also, the organic light-emitting compound layer 155 includes a holeinjection layer, a hole transport layer, an emission layer, an electrontransport layer and an electron injection layer. Such an organiclight-emitting compound layer 155 is disposed on the second electrode145 within the display area AA.

Next, a third electrode 160 is formed on the substrate 100 provided withthe organic light-emitting compound layer 155, as shown in FIG. 10. Thethird electrode 160 can be formed by entirely depositing a metal such asaluminum or others on the substrate provided with the organiclight-emitting compound layer 155 and patterning the deposited metalthrough a seventh photolithograph process.

The third electrode 160 is electrically connected to the first electrode175 in the non-display area NDA. Also, the third electrode 160 isdisposed on the organic light-emitting compound layer 155 within thedisplay area AA.

In this manner, the OLED display device of the present embodiment allowsat least one first opening H3 to be formed in the non-display area NDA.As such, materials out-gassed from the planarization film 140 within thenon-display area NDA can be exhausted to the bank pattern 150 within thenon-display area NDA via the first opening H3.

Consequently, the OLED device of the present embodiment can prevent themovement of the materials, which are out-gassed from the non-displayarea NDA, toward the display area AA. Therefore, the deterioration ofthe organic light-emitting compound layer 150 can be prevented. As aresult, the OLED display device according to the present embodiment canenhance the reliability.

FIG. 11 is a cross-sectional view showing the cross-section of an OLEDdisplay device, which is taken along the line I-I′ in FIG. 1, accordingto another embodiment of the present disclosure. The OLED display deviceof FIG. 11 is similar to the above-mentioned device. As such, componentsof the OLED display device of FIG. 11 that are the same as those of theabove-mentioned device will be referenced using the same numerals. Also,the description regarding the components of the OLED display device ofFIG. 11 that are the same as those of the above-mentioned device will beomitted herein for the sake of brevity.

As shown in FIGS. 1 and 11, the OLED display device of anotherembodiment is defined into a display area AA used to display images anda non-display area NDA surrounding edges of the display area AA. A firstelectrode 275 is formed in the non-display area AA. Also, at least onefirst opening H3 is formed in the first electrode 275.

In addition, a second opening H4 is further formed within thenon-display area NDA. More specifically, the second opening H4 is formedbetween a second electrode 145 of an outer pixel within the display areaAA and the first electrode 275 within the non-display area NDA.

Such a second opening H4 can enable the first electrode 275 to beseparated by a fixed distance A, for example by at least one pixel, fromthe second electrode 145 of outer pixel within the display area AA.

In this manner, the first opening H3 and the second opening H4 areformed within the non-display area NDA. As such, materials out-gassedfrom the planarization film 140 within the non-display area NDA can beexhausted to the bank pattern 150 within the non-display area NDA viathe first opening H3 and the second opening H4.

Consequently, the OLED device of another embodiment can prevent themovement of the materials, which are out-gassed from the non-displayarea NDA, toward the display area AA. Therefore, the deterioration ofthe organic light-emitting compound layer 150 can be prevented. As aresult, the OLED display device according to the present embodiment canenhance the reliability.

The structure of the OLED display device according to the presentdisclosure is not limited to the above-mentioned embodiments. In otherwords, the OLED display device according to the present disclosure caninclude any array structure which has a hole within the non-displayarea.

The ordinary skilled person in the art should understand that variouschanges or modifications of the present disclosure are possible withoutdeparting from the technical spirit or the essential features of thepresent disclosure. As such, it should be understood by the ordinaryskilled person in the art that the above-mentioned embodiments areprovided as examples of the present disclosure, but the presentdisclosure is not limited these embodiments. Accordingly, the scope ofthe present disclosure shall be determined only by the appended claimsand their equivalents. Moreover, it should be considered thatalternative uses derived from the meaning, scope and their equivalentconcepts defined in the claims are included in the scope of the presentdisclosure.

1. An organic light-emitting diode display device comprising: a displayarea defined on a substrate and configured to display images; anon-display area defined on the substrate and configured to applysignals to pixels within the display area; a first thin film transistoron the non-display area of the substrate; a second thin film transistoron the display area of the substrate; a planarization film over thefirst and second thin film transistors; a first electrode on theplanarization film in the non-display area and including a plurality offirst openings; a second electrode on the planarization film in thedisplay area and connected to an electrode of the second thin filmtransistor; a bank pattern on the second electrode and the firstelectrode, the bank pattern configured to define light-emission cellsand expose a part of the second electrode, wherein the bank pattern isarranged to cover each of the plurality of first openings in the firstelectrode; and an organic light-emitting layer formed directly on thesecond electrode.
 2. The organic light-emitting diode display device ofclaim 1, wherein the second electrode of an outer pixel within thedisplay area is spaced a distance from the first electrode within thenon-display area by a second opening of a single pixel width. 3.(canceled)
 4. The organic light-emitting diode display device of claim1, wherein the second electrode within the display area and the firstelectrode within the non-display area are formed from a same materialand through a same process.
 5. The organic light-emitting diode displaydevice of one of claim 1, wherein the second electrode within thedisplay area and the first electrode within the non-display area eachinclude: a transparent electrode formed from one of indium-tin-oxide(ITO), tin-oxide (TO), indium-zinc-oxide (IZO) and indium-tin-zinc-oxide(ITZO); a silver layer formed on the transparent electrode; and asecondary transparent electrode formed on the silver layer. 6.(canceled)
 7. A method for manufacturing an organic light-emitting diodedisplay device, the method comprising: forming a first film transistorwithin a non-display area of a substrate; forming a second thin filmtransistor within a display area of the substrate adjacent to thenon-display area of the substrate; forming a planarization film over thefirst and second thin film transistors; forming a first electrode in thenon-display area with a plurality of openings first opening and facingthe first thin film transistor, on the planarization film; forming asecond electrode in the display area connected to an electrode of thesecond thin film transistor and the first electrode; forming a bankpattern with an opening exposing a part of the second electrode on thefirst electrode and the second electrode, wherein the bank patterndefines light-emission cells and is arranged to cover each of theplurality of first opening; and forming an organic light-emitting layerdirectly on the second electrode.
 8. The method of claim 7, wherein thesecond electrode in the display area of an outer pixel within thedisplay area is spaced a distance from the first electrode in thenon-display area by a second opening of a single pixel width. 9.(canceled)
 10. The method of claim 7, wherein the second opening in thenon-display area is formed at the same time as the plurality of firstopenings in the non-display area.
 11. The method of claim 7, wherein thesecond electrode in the display area and the first electrode in thenon-display area each include: a transparent electrode formed from oneof indium-tin-oxide (ITO), tin-oxide (TO), indium-zinc-oxide (IZO) andindium-tin-zinc-oxide (ITZO); a silver layer formed on the transparentelectrode; and a secondary transparent electrode formed on the silverlayer.
 12. The organic light-emitting diode display device of claim 1,wherein the plurality of the first openings are spaced with a fixedinterval from one another.
 13. The organic light-emitting diode displaydevice of claim 1, wherein the first electrode within the non-displayarea includes a second opening and wherein the second opening is spaceda distance from the second electrode of an outer pixel within thedisplay area.
 14. The organic light-emitting diode display device ofclaim 1, wherein the first openings allow for out-gassing of materialsfrom the planarization film within the non-display area to be exhaustedto the bank pattern within the non-display area. 15-17. (canceled) 18.The organic light-emitting diode display device of claim 1, furthercomprising: a third electrode on the organic light-emitting layer andconnected to the first electrode; a conductive pattern in thenon-display area to connect the first electrode to supply a sourcevoltage to the third electrode; and an interlayer insulation film onwhich the conductive pattern is formed.
 19. The organic light-emittingdiode display device of claim 18, wherein the conductive pattern isformed at a same time as drain electrodes and source electrodes of thefirst and second thin film transistors. 20-21. (canceled)
 22. Theorganic light-emitting diode display device of claim 1, furthercomprising a third electrode on the organic light emitting layer,wherein the third electrode is separated from the plurality of firstopenings by the bank pattern.
 23. The organic light-emitting diodedisplay device of claim 1, wherein the planarization film and the bankpattern are polyimide.
 24. An organic light-emitting diode displaydevice comprising: a first electrode on a planarization film in anon-display area, a plurality of openings formed in the first electrode,the plurality of openings comprising an outermost first opening furthestfrom a display area; a second electrode on the planarization film in thedisplay area; a bank pattern on the second electrode and the firstelectrode, the bank pattern configured to define light-emission cellsand expose a part of the second electrode, at least the outermost firstopening covered by the bank pattern; an organic light-emitting layer onthe second electrode; and a third electrode on the organiclight-emitting layer and connected to the first electrode.
 25. Theorganic light-emitting diode display device of claim 24, wherein each ofthe plurality of openings is rectangular.
 26. The organic light-emittingdiode display device of claim 24, wherein the planarization film and thebank pattern are polyimide.
 27. The organic light-emitting diode displaydevice of claim 24, further comprising a conductive pattern in thenon-display area to connect the first electrode to a supply voltagesource, wherein the bank pattern covers at least a part of theconductive pattern.
 28. The organic light-emitting diode display deviceof claim 27, wherein the conductive pattern is formed at a same time asdrain electrodes and source electrodes of the first and second thin filmtransistors.
 29. An apparatus comprising: a display area having an anodeelectrode, a cathode electrode above the anode electrode and an organiclight-emitting layer therebetween for displaying images; a gate-in-panelarea having a circuit portion configured to transfer scan signals to thedisplay area and located outside the display area; a planarization layerconfigured to cover the circuit portion; a conductive pattern configuredto transfer a voltage to the cathode electrode, the conductive patternlocated outside the gate-in-panel area and outside the cathodeelectrode; a first electrode on the planarization layer and having aplurality of outgassing openings exposing portions of the planarizationlayer, the first electrode made of the same material as that of theanode electrode; and a bank pattern configured to insulate the cathodeelectrode and the first electrode, the bank pattern configured to coverall of the plurality of outgassing openings and having a contact openingconfigured to interconnect the cathode electrode and the firstelectrode, the contact opening is located between two adjacentoutgassing openings.
 30. The apparatus of claim 29, wherein a portion ofthe first electrode is in contact with a portion of the cathodeelectrode, another portion of the first electrode is in contact with aportion of the conductive pattern, and at least one outgassing openingis located therebetween, and wherein the cathode electrode is not incontact with the conductive pattern and the cathode electrode iselectrically connected to the conductive pattern by the first electrode.31. The apparatus of claim 30, wherein the cathode electrode extendstoward to the conductive pattern and the first electrode extends towardto the conductive pattern further than the cathode electrode.
 32. Theapparatus of claim 31, wherein the cathode electrode does not overlapthe conductive pattern.
 33. The apparatus of claim 32, wherein thecathode electrode overlaps a portion of the first electrode and anotherportion of the first electrode overlaps the conductive pattern.
 34. Theapparatus of claim 30, wherein an end portion of the planarization layercovers a portion of the conductive pattern.
 35. The apparatus of claim29, wherein the plurality of outgassing openings further comprising afirst outgassing opening having a first width and a second outgassingopening having a second width wider than the first width.
 36. Theapparatus of claim 35, wherein the second outgassing opening is at aborder between the gate-in-panel area and the display area.